1BSR

BOVINE SEMINAL RIBONUCLEASE STRUCTURE AT 1.9 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

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This is version 1.3 of the entry. See complete history


Literature

Bovine seminal ribonuclease: structure at 1.9 A resolution.

Mazzarella, L.Capasso, S.Demasi, D.Di Lorenzo, G.Mattia, C.A.Zagari, A.

(1993) Acta Crystallogr D Biol Crystallogr 49: 389-402

  • DOI: 10.1107/S0907444993003403
  • Primary Citation of Related Structures:  
    1BSR

  • PubMed Abstract: 
  • The crystal structure of bovine seminal ribonuclease, a homodimeric enzyme closely related to pancreatic ribonuclease, has been refined at a nominal resolution of 1.9 A employing data collected on an electronic area detector. The final model consists of two chains containing 1990 non-H atoms, seven sulfate anions and 113 water molecules per asymmetric unit ...

    The crystal structure of bovine seminal ribonuclease, a homodimeric enzyme closely related to pancreatic ribonuclease, has been refined at a nominal resolution of 1.9 A employing data collected on an electronic area detector. The final model consists of two chains containing 1990 non-H atoms, seven sulfate anions and 113 water molecules per asymmetric unit. The unit-cell parameters are a = 36.5 (1), b = 66.7 (1) and c = 107.5 (2) A, space group P22(1)2(1). The R factor is 0.177 for 16 492 reflections in the resolution range 6.0-1.9 A and the deviations from ideal values of bond lengths and bond angles are 0.020 A and 3.7 degrees, respectively. The molecule is formed by two pancreatic like chains, which have their N-terminal segments interchanged so that each active site is formed by residues from both subunits. The two chains are related by a non-crystallographic twofold symmetry and are covalently linked by two consecutive disulfide bridges, which form an unusual sixteen-membered ring across the dimer interface. The deviations from the molecular symmetry, the hydration shell and the sulfate-binding sites are also discussed in relation to the known structure of the pancreatic enzyme.


    Related Citations: 
    • Composite Active Sites in Bovine Seminal Ribonuclease
      Mazzarella, L., Mattia, C.A., Capasso, S., Di Lorenzo, G.
      (1987) Gazz Chim Ital 117: 91
    • Refinement of the Structure of Bovine Seminal Ribonuclease
      Capasso, S., Giordano, F., Mattia, C.A., Mazzarella, L., Zagari, A.
      (1983) Biopolymers 22: 327
    • Low-Resolution Structure of Bovine Seminal Ribonuclease: A Covalent Dimeric Protein
      Capasso, S., Giordano, F., Mattia, C.A., Mazzarella, L., Zagari, A.
      (1979) Gazz Chim Ital 109: 55

    Organizational Affiliation

    Dipartimento di Chimica, Università Federico II, Napoli, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BOVINE SEMINAL RIBONUCLEASEA, B124Bos taurusMutation(s): 0 
Gene Names: SRN
EC: 4.6.1.18
UniProt
Find proteins for P00669 (Bos taurus)
Explore P00669 
Go to UniProtKB:  P00669
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.5α = 90
b = 66.7β = 90
c = 107.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 1993-04-28 
  • Released Date: 1993-10-31 
  • Deposition Author(s): Mazzarella, L.

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model